MAN marine engines we service
Our diesel technicians work across the MAN marine range — propulsion and auxiliary — for both pleasure and commercial vessels. If your model isn't listed, call us; we almost certainly cover it.
MAN Servicing & Scheduled Maintenance
Regular servicing is the cheapest insurance you can buy for a high-output MAN diesel, and our experienced technicians service all MAN marine engines to manufacturer-recommended intervals. We tailor each service to how your i6, V8 or V12 is actually used — leisure cruising, charter or hard commercial duty — so wear items are caught before they become breakdowns. Book a scheduled service and we will keep clear records for your logbook, insurer and future resale.
Diagnostics & Electronic Fault-Finding
Modern MAN marine engines run sophisticated common-rail injection and electronic engine management, so accurate diagnosis matters before any parts are replaced. Our technicians read fault codes, interrogate live engine data and trace the real cause of overheating, power loss, hard starting, smoke or warning alarms. You get a clear explanation of what is wrong and a fixed-scope quote — no guesswork and no parts-cannon.
Repairs, Overhauls & Rebuilds
From a single injector to a complete engine, we carry out mechanical and electronic repairs, top-end work and full overhauls on MAN marine diesels. Whether it is cooling, fuel, turbo or injection trouble, we repair the cause properly rather than patching the symptom. When an engine is tired, we will give you a straight assessment of rebuild versus replacement so you can spend your money where it counts.
Parts, Repower & Installation Support
We source genuine MAN parts and quality aftermarket components to suit your budget and how long you plan to keep the boat. If your MAN is beyond economical repair, we provide impartial repower advice and support engine installation, alignment and commissioning. As authorised dealers for Volvo Penta, Yanmar, Twin Disc and ZF, we can also talk through repower options and supply matched gearboxes.
Mobile Service, Commercial & Survey Support
Some jobs are easier done where the boat sits, so we offer mobile service to marinas and moorings across Port Phillip Bay, with larger work handled at our Spotswood workshop. We support commercial operators and owners preparing for survey with inspections, fault rectification and clear documentation. Pre-purchase and insurance inspections give you an independent, expert view of a MAN engine's true condition before you buy or renew cover.
Vessels & applications we look after
Get a MAN service quote
Tell us your MAN model and what you need — a service, a fault diagnosed, or a full rebuild — and we'll get back to you fast from our Spotswood, Melbourne workshop.
Why boat owners choose us
MAN marine service — your questions answered
Do you service MAN marine engines even though you are not a MAN dealer?
Yes. Mariner Engineering is an independent marine workshop and our diesel technicians service, diagnose, repair and rebuild MAN marine engines every day. We are not a factory-authorised MAN dealer, but we have the diagnostic equipment, experience and parts access to look after your i6, V8 or V12 properly. Call (03) 9399 5888 to discuss your engine.
Can you get parts for MAN marine engines?
Yes. We source genuine MAN parts as well as quality aftermarket components, and we will recommend the right option for your budget and how long you plan to keep the boat. Common service items such as filters, impellers, belts and sensors are readily available. For less common parts we will confirm availability and lead time up front when we quote.
Do you offer mobile service for MAN engines around Port Phillip Bay?
Yes. We provide mobile service to marinas and moorings across Port Phillip Bay for servicing, diagnostics and many repairs. Larger jobs such as overhauls and rebuilds are best done at our Spotswood workshop where we have the tools and lifting gear. Call (03) 9399 5888 and we will work out whether your job suits a mobile visit or a workshop booking.
Should I rebuild my MAN engine or replace it?
It depends on hours, overall condition and how long you intend to keep the vessel. We will assess the engine honestly and give you the real cost of a rebuild against a repower, so you can make an informed decision. As authorised dealers for Volvo Penta, Yanmar, Twin Disc and ZF, we can also map out repower options if replacement makes more sense. Book an inspection and we will give you a clear recommendation.
Can you diagnose electronic and common-rail faults on newer MAN engines?
Yes. We diagnose common-rail injection and electronic engine-management faults using fault-code reading and live engine data, so we fix the actual cause rather than swapping parts and hoping. This covers warning alarms, power loss, smoke, hard starting and overheating. You will get a clear explanation and a fixed-scope quote before work begins.
How quickly can you turn my MAN engine around?
Routine servicing and many diagnostic jobs can usually be scheduled quickly, while overhauls and rebuilds depend on parts lead times and the scope of work. We will give you a realistic timeframe when we quote and keep you updated throughout. For urgent breakdowns, call (03) 9399 5888 and we will prioritise getting you back on the water.
Request a MAN service or repair quote
Tell us your MAN engine model, your vessel and the service, fault or rebuild you need, and our team will get back to you with a quote — usually within 1 business day.
Mariner Engineering is an independent marine service and repair provider and is not an authorised dealer of, or affiliated with, MAN. MAN and associated model names are trademarks of their respective owners, used here only to describe the engines we service.